started implementation of libstrongswan code integrity check
This commit is contained in:
Andreas Steffen
@@ -0,0 +1,79 @@
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/**
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* @file fips.c
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*
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* @brief Implementation of the libstrongswan integrity test.
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*
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*/
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/*
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* Copyright (C) 2007 Bruno Krieg, Daniel Wydler
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "fips.h"
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#include <debug.h>
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#include <crypto/signers/hmac_signer.h>
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extern const unsigned char FIPS_rodata_start[];
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extern const unsigned char FIPS_rodata_end[];
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extern const void *FIPS_text_start();
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extern const void *FIPS_text_end();
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/**
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* Described in header
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*/
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char* fips_compute_hmac_signature(const char *key)
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{
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chunk_t hmac_key = { key, strlen(key) };
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hmac_signer_t *signer = hmac_signer_create(HASH_SHA1, HASH_SIZE_SHA1);
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DBG1(" TEXT: %p + %6d = %p",
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FIPS_text_start(),
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(int)( (size_t)FIPS_text_end() - (size_t)FIPS_text_start() ),
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FIPS_text_end());
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DBG1(" RODATA: %p + %6d = %p",
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FIPS_rodata_start,
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(int)( (size_t)FIPS_rodata_end - (size_t)FIPS_rodata_start ),
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FIPS_rodata_end);
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if (signer == NULL)
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{
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DBG1(" fips hmac signer could not be created");
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return NULL;
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}
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signer->signer_interface.set_key((signer_t *)signer, hmac_key);
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signer->signer_interface.destroy((signer_t *)signer);
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return strdup("01020304050607080901011121314151617181920");
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}
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/**
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* Described in header
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*/
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status_t fips_verify_hmac_signature(const char *signature,
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const char *key)
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{
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status_t status;
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char *current_signature = fips_compute_hmac_signature(key);
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if (current_signature == NULL)
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{
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status = FAILED;
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}
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else
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{
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status = streq(signature, current_signature)? SUCCESS:VERIFY_ERROR;
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free(current_signature);
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}
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return status;
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}
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@@ -0,0 +1,46 @@
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/**
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* @file fips.h
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*
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* @brief Interface of the libstrongswan integrity test
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*
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* @ingroup fips
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*/
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/*
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* Copyright (C) 2007 Bruno Krieg, Daniel Wydler
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#ifndef FIPS_H_
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#define FIPS_H_
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#include <library.h>
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/**
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* @brief compute SHA-1 HMAC signature over RODATA and TEXT sections of libstrongswan
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*
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* @param key key used for SHA-1 HMAC signature in string format
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* @return SHA-1 HMAC signature in HEX format
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*/
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char* fips_compute_hmac_signature(const char *key);
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/**
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* @brief verify HMAC signature over RODATA and TEXT sections of libstrongswan
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*
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* @param signature signature value from fips_hmac.h in HEX format
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* @param key key used for SHA-1 HMAC signature in string format
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* @return SUCCESS if signatures agree
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*/
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status_t fips_verify_hmac_signature(const char *signature, const char *key);
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#endif /*FIPS_H_*/
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@@ -0,0 +1,164 @@
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/* ====================================================================
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* Copyright (c) 2005 The OpenSSL Project. Rights for redistribution
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* and usage in source and binary forms are granted according to the
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* OpenSSL license.
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*/
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#include <stdio.h>
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#if defined(__DECC)
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# include <c_asm.h>
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# pragma __nostandard
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#endif
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#if !defined(POINTER_TO_FUNCTION_IS_POINTER_TO_1ST_INSTRUCTION)
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# if (defined(__sun) && (defined(__sparc) || defined(__sparcv9))) || \
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(defined(__sgi) && (defined(__mips) || defined(mips))) || \
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(defined(__osf__) && defined(__alpha)) || \
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(defined(__linux) && (defined(__arm) || defined(__arm__))) || \
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(defined(__i386) || defined(__i386__)) || \
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(defined(__x86_64) || defined(__x86_64__)) || \
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(defined(vax) || defined(__vax__))
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# define POINTER_TO_FUNCTION_IS_POINTER_TO_1ST_INSTRUCTION
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# endif
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#endif
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#define FIPS_ref_point FIPS_text_end
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/* Some compilers put string literals into a separate segment. As we
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* are mostly interested to hash AES tables in .rodata, we declare
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* reference points accordingly. In case you wonder, the values are
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* big-endian encoded variable names, just to prevent these arrays
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* from being merged by linker. */
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const unsigned int FIPS_rodata_end[]=
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{ 0x46495053, 0x5f726f64, 0x6174615f, 0x656e645b };
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/*
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* I declare reference function as static in order to avoid certain
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* pitfalls in -dynamic linker behaviour...
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*/
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static void *instruction_pointer(void)
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{ void *ret=NULL;
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/* These are ABI-neutral CPU-specific snippets. ABI-neutrality means
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* that they are designed to work under any OS running on particular
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* CPU, which is why you don't find any #ifdef THIS_OR_THAT_OS in
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* this function. */
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#if defined(INSTRUCTION_POINTER_IMPLEMENTED)
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INSTRUCTION_POINTER_IMPLEMENTED(ret);
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#elif defined(__GNUC__) && __GNUC__>=2
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# if defined(__alpha) || defined(__alpha__)
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# define INSTRUCTION_POINTER_IMPLEMENTED
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__asm __volatile ( "br %0,1f\n1:" : "=r"(ret) );
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# elif defined(__i386) || defined(__i386__)
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# define INSTRUCTION_POINTER_IMPLEMENTED
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__asm __volatile ( "call 1f\n1: popl %0" : "=r"(ret) );
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ret = (void *)((size_t)ret&~3UL); /* align for better performance */
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# elif defined(__ia64) || defined(__ia64__)
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# define INSTRUCTION_POINTER_IMPLEMENTED
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__asm __volatile ( "mov %0=ip" : "=r"(ret) );
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# elif defined(__hppa) || defined(__hppa__) || defined(__pa_risc)
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# define INSTRUCTION_POINTER_IMPLEMENTED
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__asm __volatile ( "blr %%r0,%0\n\tnop" : "=r"(ret) );
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ret = (void *)((size_t)ret&~3UL); /* mask privilege level */
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# elif defined(__mips) || defined(__mips__)
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# define INSTRUCTION_POINTER_IMPLEMENTED
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void *scratch;
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__asm __volatile ( "move %1,$31\n\t" /* save ra */
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"bal .+8; nop\n\t"
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"move %0,$31\n\t"
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"move $31,%1" /* restore ra */
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: "=r"(ret),"=r"(scratch) );
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# elif defined(__ppc__) || defined(__powerpc) || defined(__powerpc__) || \
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defined(__POWERPC__) || defined(_POWER) || defined(__PPC__) || \
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defined(__PPC64__) || defined(__powerpc64__)
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# define INSTRUCTION_POINTER_IMPLEMENTED
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void *scratch;
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__asm __volatile ( "mfspr %1,8\n\t" /* save lr */
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"bl .+4\n\t"
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"mfspr %0,8\n\t" /* mflr ret */
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"mtspr 8,%1" /* restore lr */
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: "=r"(ret),"=r"(scratch) );
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# elif defined(__sparc) || defined(__sparc__) || defined(__sparcv9)
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# define INSTRUCTION_POINTER_IMPLEMENTED
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void *scratch;
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__asm __volatile ( "mov %%o7,%1\n\t"
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"call .+8; nop\n\t"
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"mov %%o7,%0\n\t"
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"mov %1,%%o7"
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: "=r"(ret),"=r"(scratch) );
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# elif defined(__x86_64) || defined(__x86_64__)
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# define INSTRUCTION_POINTER_IMPLEMENTED
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__asm __volatile ( "leaq 0(%%rip),%0" : "=r"(ret) );
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ret = (void *)((size_t)ret&~3UL); /* align for better performance */
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# endif
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#elif defined(__DECC) && defined(__alpha)
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# define INSTRUCTION_POINTER_IMPLEMENTED
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ret = (void *)(size_t)asm("br %v0,1f\n1:");
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#elif defined(_MSC_VER) && defined(_M_IX86)
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# undef INSTRUCTION_POINTER_IMPLEMENTED
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void *scratch;
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_asm {
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call self
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self: pop eax
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mov scratch,eax
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}
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ret = (void *)((size_t)scratch&~3UL);
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#endif
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return ret;
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}
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/*
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* This function returns pointer to an instruction in the vicinity of
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* its entry point, but not outside this object module. This guarantees
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* that sequestered code is covered...
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*/
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void *FIPS_ref_point()
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{
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#if defined(INSTRUCTION_POINTER_IMPLEMENTED)
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return instruction_pointer();
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/* Below we essentially cover vendor compilers which do not support
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* inline assembler... */
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#elif defined(_AIX)
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struct { void *ip,*gp,*env; } *p = (void *)instruction_pointer;
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return p->ip;
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#elif defined(_HPUX_SOURCE)
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# if defined(__hppa) || defined(__hppa__)
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struct { void *i[4]; } *p = (void *)FIPS_ref_point;
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if (sizeof(p) == 8) /* 64-bit */
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return p->i[2];
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else if ((size_t)p & 2)
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{ p = (void *)((size_t)p&~3UL);
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return p->i[0];
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}
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else
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return (void *)p;
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# elif defined(__ia64) || defined(__ia64__)
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struct { unsigned long long ip,gp; } *p=(void *)instruction_pointer;
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return (void *)(size_t)p->ip;
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# endif
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#elif (defined(__VMS) || defined(VMS)) && !(defined(vax) || defined(__vax__))
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/* applies to both alpha and ia64 */
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struct { unsigned __int64 opaque,ip; } *p=(void *)instruction_pointer;
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return (void *)(size_t)p->ip;
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#elif defined(__VOS__)
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/* applies to both pa-risc and ia32 */
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struct { void *dp,*ip,*gp; } *p = (void *)instruction_pointer;
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return p->ip;
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#elif defined(_WIN32)
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# if defined(_WIN64) && defined(_M_IA64)
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struct { void *ip,*gp; } *p = (void *)FIPS_ref_point;
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return p->ip;
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# else
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return (void *)FIPS_ref_point;
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# endif
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/*
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* In case you wonder why there is no #ifdef __linux. All Linux targets
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||||
* are GCC-based and therefore are covered by instruction_pointer above
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||||
* [well, some are covered by by the one below]...
|
||||
*/
|
||||
#elif defined(POINTER_TO_FUNCTION_IS_POINTER_TO_1ST_INSTRUCTION)
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return (void *)instruction_pointer;
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#else
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return NULL;
|
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#endif
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}
|
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@@ -0,0 +1,165 @@
|
||||
/* ====================================================================
|
||||
* Copyright (c) 2005 The OpenSSL Project. Rights for redistribution
|
||||
* and usage in source and binary forms are granted according to the
|
||||
* OpenSSL license.
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#if defined(__DECC)
|
||||
# include <c_asm.h>
|
||||
# pragma __nostandard
|
||||
#endif
|
||||
|
||||
#if !defined(POINTER_TO_FUNCTION_IS_POINTER_TO_1ST_INSTRUCTION)
|
||||
# if (defined(__sun) && (defined(__sparc) || defined(__sparcv9))) || \
|
||||
(defined(__sgi) && (defined(__mips) || defined(mips))) || \
|
||||
(defined(__osf__) && defined(__alpha)) || \
|
||||
(defined(__linux) && (defined(__arm) || defined(__arm__))) || \
|
||||
(defined(__i386) || defined(__i386__)) || \
|
||||
(defined(__x86_64) || defined(__x86_64__)) || \
|
||||
(defined(vax) || defined(__vax__))
|
||||
# define POINTER_TO_FUNCTION_IS_POINTER_TO_1ST_INSTRUCTION
|
||||
# endif
|
||||
#endif
|
||||
|
||||
|
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#define FIPS_ref_point FIPS_text_start
|
||||
/* Some compilers put string literals into a separate segment. As we
|
||||
* are mostly interested to hash AES tables in .rodata, we declare
|
||||
* reference points accordingly. In case you wonder, the values are
|
||||
* big-endian encoded variable names, just to prevent these arrays
|
||||
* from being merged by linker. */
|
||||
const unsigned int FIPS_rodata_start[]=
|
||||
{ 0x46495053, 0x5f726f64, 0x6174615f, 0x73746172 };
|
||||
|
||||
|
||||
/*
|
||||
* I declare reference function as static in order to avoid certain
|
||||
* pitfalls in -dynamic linker behaviour...
|
||||
*/
|
||||
static void *instruction_pointer(void)
|
||||
{ void *ret=NULL;
|
||||
/* These are ABI-neutral CPU-specific snippets. ABI-neutrality means
|
||||
* that they are designed to work under any OS running on particular
|
||||
* CPU, which is why you don't find any #ifdef THIS_OR_THAT_OS in
|
||||
* this function. */
|
||||
#if defined(INSTRUCTION_POINTER_IMPLEMENTED)
|
||||
INSTRUCTION_POINTER_IMPLEMENTED(ret);
|
||||
#elif defined(__GNUC__) && __GNUC__>=2
|
||||
# if defined(__alpha) || defined(__alpha__)
|
||||
# define INSTRUCTION_POINTER_IMPLEMENTED
|
||||
__asm __volatile ( "br %0,1f\n1:" : "=r"(ret) );
|
||||
# elif defined(__i386) || defined(__i386__)
|
||||
# define INSTRUCTION_POINTER_IMPLEMENTED
|
||||
__asm __volatile ( "call 1f\n1: popl %0" : "=r"(ret) );
|
||||
ret = (void *)((size_t)ret&~3UL); /* align for better performance */
|
||||
# elif defined(__ia64) || defined(__ia64__)
|
||||
# define INSTRUCTION_POINTER_IMPLEMENTED
|
||||
__asm __volatile ( "mov %0=ip" : "=r"(ret) );
|
||||
# elif defined(__hppa) || defined(__hppa__) || defined(__pa_risc)
|
||||
# define INSTRUCTION_POINTER_IMPLEMENTED
|
||||
__asm __volatile ( "blr %%r0,%0\n\tnop" : "=r"(ret) );
|
||||
ret = (void *)((size_t)ret&~3UL); /* mask privilege level */
|
||||
# elif defined(__mips) || defined(__mips__)
|
||||
# define INSTRUCTION_POINTER_IMPLEMENTED
|
||||
void *scratch;
|
||||
__asm __volatile ( "move %1,$31\n\t" /* save ra */
|
||||
"bal .+8; nop\n\t"
|
||||
"move %0,$31\n\t"
|
||||
"move $31,%1" /* restore ra */
|
||||
: "=r"(ret),"=r"(scratch) );
|
||||
# elif defined(__ppc__) || defined(__powerpc) || defined(__powerpc__) || \
|
||||
defined(__POWERPC__) || defined(_POWER) || defined(__PPC__) || \
|
||||
defined(__PPC64__) || defined(__powerpc64__)
|
||||
# define INSTRUCTION_POINTER_IMPLEMENTED
|
||||
void *scratch;
|
||||
__asm __volatile ( "mfspr %1,8\n\t" /* save lr */
|
||||
"bl .+4\n\t"
|
||||
"mfspr %0,8\n\t" /* mflr ret */
|
||||
"mtspr 8,%1" /* restore lr */
|
||||
: "=r"(ret),"=r"(scratch) );
|
||||
# elif defined(__sparc) || defined(__sparc__) || defined(__sparcv9)
|
||||
# define INSTRUCTION_POINTER_IMPLEMENTED
|
||||
void *scratch;
|
||||
__asm __volatile ( "mov %%o7,%1\n\t"
|
||||
"call .+8; nop\n\t"
|
||||
"mov %%o7,%0\n\t"
|
||||
"mov %1,%%o7"
|
||||
: "=r"(ret),"=r"(scratch) );
|
||||
# elif defined(__x86_64) || defined(__x86_64__)
|
||||
# define INSTRUCTION_POINTER_IMPLEMENTED
|
||||
__asm __volatile ( "leaq 0(%%rip),%0" : "=r"(ret) );
|
||||
ret = (void *)((size_t)ret&~3UL); /* align for better performance */
|
||||
# endif
|
||||
#elif defined(__DECC) && defined(__alpha)
|
||||
# define INSTRUCTION_POINTER_IMPLEMENTED
|
||||
ret = (void *)(size_t)asm("br %v0,1f\n1:");
|
||||
#elif defined(_MSC_VER) && defined(_M_IX86)
|
||||
# undef INSTRUCTION_POINTER_IMPLEMENTED
|
||||
void *scratch;
|
||||
_asm {
|
||||
call self
|
||||
self: pop eax
|
||||
mov scratch,eax
|
||||
}
|
||||
ret = (void *)((size_t)scratch&~3UL);
|
||||
#endif
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* This function returns pointer to an instruction in the vicinity of
|
||||
* its entry point, but not outside this object module. This guarantees
|
||||
* that sequestered code is covered...
|
||||
*/
|
||||
void *FIPS_ref_point()
|
||||
{
|
||||
#if defined(INSTRUCTION_POINTER_IMPLEMENTED)
|
||||
return instruction_pointer();
|
||||
/* Below we essentially cover vendor compilers which do not support
|
||||
* inline assembler... */
|
||||
#elif defined(_AIX)
|
||||
struct { void *ip,*gp,*env; } *p = (void *)instruction_pointer;
|
||||
return p->ip;
|
||||
#elif defined(_HPUX_SOURCE)
|
||||
# if defined(__hppa) || defined(__hppa__)
|
||||
struct { void *i[4]; } *p = (void *)FIPS_ref_point;
|
||||
|
||||
if (sizeof(p) == 8) /* 64-bit */
|
||||
return p->i[2];
|
||||
else if ((size_t)p & 2)
|
||||
{ p = (void *)((size_t)p&~3UL);
|
||||
return p->i[0];
|
||||
}
|
||||
else
|
||||
return (void *)p;
|
||||
# elif defined(__ia64) || defined(__ia64__)
|
||||
struct { unsigned long long ip,gp; } *p=(void *)instruction_pointer;
|
||||
return (void *)(size_t)p->ip;
|
||||
# endif
|
||||
#elif (defined(__VMS) || defined(VMS)) && !(defined(vax) || defined(__vax__))
|
||||
/* applies to both alpha and ia64 */
|
||||
struct { unsigned __int64 opaque,ip; } *p=(void *)instruction_pointer;
|
||||
return (void *)(size_t)p->ip;
|
||||
#elif defined(__VOS__)
|
||||
/* applies to both pa-risc and ia32 */
|
||||
struct { void *dp,*ip,*gp; } *p = (void *)instruction_pointer;
|
||||
return p->ip;
|
||||
#elif defined(_WIN32)
|
||||
# if defined(_WIN64) && defined(_M_IA64)
|
||||
struct { void *ip,*gp; } *p = (void *)FIPS_ref_point;
|
||||
return p->ip;
|
||||
# else
|
||||
return (void *)FIPS_ref_point;
|
||||
# endif
|
||||
/*
|
||||
* In case you wonder why there is no #ifdef __linux. All Linux targets
|
||||
* are GCC-based and therefore are covered by instruction_pointer above
|
||||
* [well, some are covered by by the one below]...
|
||||
*/
|
||||
#elif defined(POINTER_TO_FUNCTION_IS_POINTER_TO_1ST_INSTRUCTION)
|
||||
return (void *)instruction_pointer;
|
||||
#else
|
||||
return NULL;
|
||||
#endif
|
||||
}
|
||||
@@ -0,0 +1,61 @@
|
||||
/**
|
||||
* @file fips_signer.c
|
||||
*
|
||||
* @brief Computes a HMAC signature and stores it in fips_signature.h.
|
||||
*
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2007 Bruno Krieg, Daniel Wydler
|
||||
* Hochschule fuer Technik Rapperswil, Switzerland
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
||||
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
* for more details.
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include "fips.h"
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
FILE *f;
|
||||
char *hmac_key = "strongSwan Version " VERSION;
|
||||
char *hmac_signature = fips_compute_hmac_signature(hmac_key);
|
||||
|
||||
if (hmac_signature == NULL)
|
||||
{
|
||||
exit(1);
|
||||
}
|
||||
|
||||
/**
|
||||
* write computed HMAC signature to fips_signature.h
|
||||
*/
|
||||
f = fopen("fips_signature.h", "wt");
|
||||
|
||||
if (f == NULL)
|
||||
{
|
||||
exit(1);
|
||||
}
|
||||
fprintf(f, "/* HMAC signature computed over TEXT and RODATA of libstrongswan\n");
|
||||
fprintf(f, " *\n");
|
||||
fprintf(f, " * This file has been automatically generated by fips_signer\n");
|
||||
fprintf(f, " * Do not edit manually!\n");
|
||||
fprintf(f, " */\n");
|
||||
fprintf(f, "\n");
|
||||
fprintf(f, "#ifndef FIPS_SIGNATURE_H_\n");
|
||||
fprintf(f, "#define FIPS_SIGNATURE_H_\n");
|
||||
fprintf(f, "\n");
|
||||
fprintf(f, "const char *hmac_key =\"%s\";\n", hmac_key);
|
||||
fprintf(f, "const char *hmac_signature =\"%s\";\n", hmac_signature);
|
||||
fprintf(f, "\n");
|
||||
fprintf(f, "#endif /* FIPS_SIGNATURE_H_ */\n");
|
||||
fclose(f);
|
||||
exit(0);
|
||||
}
|
||||
Reference in New Issue
Block a user